20 kHz Conventional Hall current sensor with digital output
MLX91229
The MLX91229 is a high-performance conventional Hall current sensor IC featuring an advanced second-order sigma-delta digital output to deliver ultimate signal integrity in noisy traction inverter environments.
Top features
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Sigma-Delta modulator output to tolerate heavy EMI
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Customer controlled demodulation at MCU for speed (overcurrent) or accuracy (control)
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Flexible interface
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Separate Clock and Data pins.
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Manchester encoding via differential RS-422 or LVDS
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Drop-in Retrofit: same footprint as existing analog Hall solutions for easy layout replacement
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Wide range capability
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Measures peak magnetic fields from 11 to 400 mT
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Support primary high-power current sensing from 200 to 2000 A.
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Selectable clock options
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Internal 10.7 MHz clock
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External 5 MHz to 12.5 MHz clock synchronization
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4-SIP (VA packages, RoHS compliant)
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Automotive AECQ-100
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Ambient operating temperatures from -40°C to 125°C
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Selectable 3.3V or 5V voltage supply options
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20 kHz Conventional Hall current sensor with digital output - MLX91229
Product description
The MLX91229 is a high-performance, monolithic Hall-effect current sensor IC sensitive to the magnetic flux density applied orthogonally to the surface of the integrated circuit. Unlike traditional analog sensors, the MLX91229 features an internal second-order sigma-delta modulator that converts the analog magnetic signal into a high-speed, fully digital bitstream output.
By shifting signal transmission from the analog to the digital domain, the device provides an inherent noise margin that tolerates heavy electromagnetic interference (EMI). This makes it perfectly adapted for modern high-speed, noise-sensitive automotive power electronics such as traction inverters and battery management systems (BMS).
Architecture flexibility
Configurable MCU demodulation allows users to optimize performance for either speed (e.g., fast overcurrent detection) or accuracy (e.g., precise system control).
The transfer characteristic is factory trimmed over temperature to guarantee exceptional native linearity. Key operational configurations, including coarse and fine gain sensitivity, zero-field operational offset baseline, and independent internal overcurrent detection thresholds, are completely programmable via EEPROM registers during end-of-line customer calibration.
Applications
- Automotive traction inverter
- Automotive battery management systems
Features and benefits
-
Sigma-Delta modulator output to tolerate heavy EMI
-
Customer controlled demodulation at MCU for speed (overcurrent) or accuracy (control)
-
Flexible interface
-
Separate Clock and Data pins.
-
Manchester encoding via differential RS-422 or LVDS
-
-
Drop-in Retrofit: same footprint as existing analog Hall solutions for easy layout replacement
-
Wide range capability
-
Measures peak magnetic fields from 11 to 400 mT
-
Support primary high-power current sensing from 200 to 2000 A.
-
-
Selectable clock options
-
Internal 10.7 MHz clock
-
External 5 MHz to 12.5 MHz clock synchronization
-
-
4-SIP (VA packages, RoHS compliant)
-
Automotive AECQ-100
-
Ambient operating temperatures from -40°C to 125°C
-
Selectable 3.3V or 5V voltage supply options
-
